Z-Score Table
Z-Score Table is a free, no-registration web platform providing interactive standard normal distribution tables and z-score calculators for students, educators, researchers, and professionals performing statistical analysis.
- Company typePrivate
- Founded2025
- Headquarters—
- Headcount1–10
- GTM typeB2C
- OfferingSoftware
What Z-Score Table does
Z-Score Table is an independent, bootstrapped web-based educational resource that publishes interactive standard normal distribution tables and two statistical calculators (a Z-Score Calculator and a Test Value Calculator). The platform's three core products are delivered as a single browser-accessible page at zscoretable.com with no registration, login, or payment required: positive z-score tables covering z = 0.00 to 3.99, negative z-score tables covering z = −3.99 to 0.00, and a forward/reverse calculator pair that converts between raw scores, z-scores, and percentiles given a mean and standard deviation. The technical stack is light — a content-managed site (WordPress-based, per image asset path) with hover/click-interactive table cells — and the product is positioned as a free, no-friction utility for students, educators, researchers, and software/analytics professionals performing hypothesis testing, confidence interval calculations, and probability lookups.
The business model is freemium in classification but operates de facto as a free resource with no disclosed paid tiers, no subscription, no paywall, and no enterprise contract layer. The only revenue-side indicator is an unconfirmed reference to third-party advertising as a possible support mechanism; no ad placements, sponsorships, affiliate arrangements, or data monetization are documented. Go-to-market is product-led growth supplemented by community-led content: an educational blog drives organic search discovery, and the site maintains organic presence on X, LinkedIn, F6S, Crunchbase, and Product Hunt. There is no sales team, no funding history, no management team disclosed, no app, no API, and no integrations. The entity is headquartered in Philadelphia, Pennsylvania (though no corporate suffix or incorporation jurisdiction is publicly confirmed), and appears to be founder-operated by self-described statistics enthusiasts.
Z-Score Table firmographics
Firmographics- Name
- Z-Score Table
- Legal name
- Z-Score Table
- Website
- https://zscoretable.com
- Company type
- Private
- Founded year
- 2025
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Z-Score Table is a free, no-registration web platform providing interactive standard normal distribution tables and z-score calculators for students, educators, researchers, and professionals performing statistical analysis.
- Ownership category
- akta.pro rank
Z-Score Table industry classification
Industry- Product category
- Statistical Reference Software
- NAICS
- Exam Preparation and Tutoring (611691)
- akta.pro primary industry
- Statistics & Data Analysis Tutoring (EDANAAAH)
- akta.pro secondary industry
- Assessment, Testing & Analytics Platforms (Formative/Summative) (EDAJAMAC)
Keywords
Z-Score Table business model
Business model- GTM type
- B2C
- Offering type
- Software
- Cost components
- Technology or R&D, Infrastructure, Marketing or Sales, Operations
Revenue model
- Free Educational Resource: The platform operates as a completely free educational resource with no subscriptions, paywalls, or complicated sign-ups. Revenue generation model is not explicitly disclosed but the site indicates it may use third-party advertising to support operations.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Pay-as-you-go | Free access to all tables and calculators |
Go-to-market motion2 records
Distribution channels1 record
Marketing channels3 records
Z-Score Table product offering
Product offeringCore offering
Z-Score Table provides free, browser-based interactive standard normal distribution tables covering z-scores from -3.99 to +3.99 with cumulative probability values, along with a Z-Score Calculator that converts raw scores into z-scores and a Test Value Calculator that reverses the lookup from percentile or z-score to raw score. All tools are accessible without registration, login, or payment through the zscoretable.com website, targeted at students, educators, researchers, and professionals performing hypothesis testing, confidence interval calculations, and probability analysis.
Product overview
Z-Score Table is a single, unified free educational resource providing statistical reference tools centered around z-score analysis. The core offering consists of three integrated tools: (1) the Z-Score Table (Standard Normal Table) — an interactive lookup table covering z-scores from -3.99 to +3.99 with cumulative probabilities to four decimal places, (2) the Z-Score Calculator — which converts raw scores to z-scores and probability percentages, and (3) the Test Value Calculator — which reverses the process by converting percentiles or z-scores back to raw scores. All tools are freely accessible without registration and are designed for students, educators, researchers, and professionals performing hypothesis testing, confidence interval calculations, and probability analysis.
Differentiator
Problem solved
Functional benefit
Products and services
- Z-Score Table (Standard Normal Table) An interactive statistical reference table that displays cumulative probabilities for z-scores ranging from -3.99 to +3.99, enabling users to quickly look up the probability that a randomly selected value falls below a given z-score in a standard normal distribution. Available as both positive (0.00 to 3.99) and negative (-3.99 to -0.00) tables, with hover/click cell highlighting of row and column headers, intended for students, educators, researchers, and professionals performing hypothesis testing and probability analysis.
- Z-Score Calculator An online calculator that computes the z-score from raw score (X), population mean (μ), and standard deviation (σ) inputs, displaying both the z-score value and the corresponding probability percentage. Designed for users who need to standardize raw data points quickly for hypothesis testing or probability interpretation without installing specialized statistical software.
- Test Value Calculator A statistical calculator that reverses the z-score lookup process, allowing users to input a z-score or percentile to calculate the corresponding raw score or test value given a known mean and standard deviation. Useful for finding cutoff scores, percentile ranks, and test thresholds in coursework and applied analysis.
Companies that use Z-Score Table
Customer profileSegments4 records
Ideal customer profiles4 records
Z-Score Table technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Z-Score Table partnerships and signals
Strategic signalScale indicators1 record
Recent moves4 records
Expansion highlights3 records
Z-Score Table competitors and assessment
Company assessmentDirect peers
- EasyCalculation.com: Free math and statistics reference site offering calculators and quick-reference tables. Comparable free, no-registration utility-tool positioning aimed at students.
- Miniwebtool: Aggregator of free online calculators and reference tools including statistics. Same horizontal utility model with SEO-driven discovery and no required signup.
- RapidTables: Online reference tables and calculators covering math, statistics, electronics, and more. Same free, browser-based reference-tool format with content/SEO-led distribution.
- Calculator.net: Free online calculator portal offering a wide range of math, statistics, and finance calculators. Closely comparable horizontal utility-tool model with the same free, ad-supported, SEO-driven GTM.
- Omni Calculator: Large catalog of free online calculators including statistics tools (z-score, t-test, chi-square). Same PLG and content-led growth motion, with similar persona targeting of students and professionals.
- Stat Trek: Statistics education site providing tutorials, reference tables (including standard normal), and calculators for AP statistics and introductory college stats students — nearly identical target user.
Emerging players
- Mathway: Math problem solver including statistics and probability. Targets the same student persona but focuses on step-by-step problem solving rather than reference tables.
- Symbolab: Math problem-solver and calculator platform with statistics capabilities. Overlaps on statistical calculation use cases for the same student persona but with broader math coverage.
Broad incumbents
- Wolfram Alpha: Computational knowledge engine that can compute z-scores, probabilities, and statistical distributions among many other domains. Much broader scope but overlapping core use case of statistical computation for students and professionals.
- Khan Academy: Major free education platform offering statistics and probability courses with reference content. Serves the same student/educator segment at much greater scale and breadth.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat2 records
Key risks7 records
Key highlights6 records
Customer concentration
Z-Score Table social profiles
Digital presenceZ-Score Table financial estimates
Financial estimateRevenue estimate
Valuation estimate
Z-Score Table leadership team
Management profileNumber of profiles
Z-Score Table funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Z-Score Table M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Z-Score Table
What does Z-Score Table do?
Z-Score Table provides free, browser-based interactive standard normal distribution tables covering z-scores from -3.99 to +3.99 with cumulative probability values, along with a Z-Score Calculator that converts raw scores into z-scores and a Test Value Calculator that reverses the lookup from percentile or z-score to raw score. All tools are accessible without registration, login, or payment through the zscoretable.com website, targeted at students, educators, researchers, and professionals performing hypothesis testing, confidence interval calculations, and probability analysis.
Is Z-Score Table a public or private company?
Z-Score Table is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Z-Score Table founded?
Z-Score Table was founded in 2025. It employs 1 to 10 people.
How does Z-Score Table make money?
One revenue line is on record: free Educational Resource.
Who are Z-Score Table's main competitors?
Direct peers on record are EasyCalculation.com, Miniwebtool, RapidTables, Calculator.net, Omni Calculator and Stat Trek. Emerging players are Mathway and Symbolab. Broad incumbents are Wolfram Alpha and Khan Academy.
Does Z-Score Table have an API?
No public API is recorded for Z-Score Table.
What industry is Z-Score Table in?
Z-Score Table's product category is Statistical Reference Software. Its primary akta.pro industry code is EDANAAAH, Statistics & Data Analysis Tutoring, with a secondary code of EDAJAMAC, Assessment, Testing & Analytics Platforms (Formative/Summative). Its NAICS code is 611691.